QUESTION 185 A network engineer receives reports about poor voice quality issues at a remote site. The network engineer does a packet capture and sees out-of-order packets being delivered. Which option can cause the VOIP quality to suffer?

Answer: D Explanation: In traditional packet forwarding systems, using different paths have varying latencies that cause out of order packets, eventually resulting in far lower performance for the network application. Also , if some packets are process switched quickly by the routing engine of the router while others are interrupt switched (which takes more time) then it could result in out of order packets. The other options would cause packet drops or latency, but not out of order packets.

QUESTION 186 What is the administrative distance for EBGP?

A. 200 B. 30 C. 70 D. 20

Answer: D

QUESTION 187 Considering the IPv6 address independence requirements, which process do you avoid when you use NPTv6 for translation?

Answer: A Explanation: options can be carried in a TCP header. Those relevant to TCP performance include Window-scale option : This option is intended to address the issue of the maximum window size in the face of paths that exhibit a high-delay bandwidth product. This option allows the window size advertisement to be right-shifted by the amount specified (in binary arithmetic, a right-shift corresponds to a multiplication by 2). Without this option, the maximum window size that can be advertised is 65,535 bytes (the maximum value obtainable in a 16-bit field). The limit of TCP transfer speed is effectively one window size in transit between the sender and the receiver. For high-speed, long-delay networks, this performance limitation is a significant factor, because it limits the transfer rate to at most 65,535 bytes per round-trip interval, regardless of available network capacity. Use of the window-scale option allows the TCP sender to effectively adapt to high-band-width, high-delay network paths, by allowing more data to be held in flight. The maximum window size with this option http://www.cisco.com/c/en/us/about/press/internet-protocol-journal/back-issues/table-contents-5/ ipj-archive/article09186a00800c8417.html

QUESTION 193 A network administrator creates a static route that points directly to a multi-access interface, instead of the next-hop IP address. The administrator notices that Cisco Express Forwarding ARP requests are being sent to all destinations. Which issue might this configuration create?

QUESTION 194 Refer to the exhibit. Which three NTP features can be deduced on the router? (choose three)

A. only accepts time requests from 192.168.1.1 B. only handle four requests at a time C. only is in stratum 4 D. only updates its time from 192.168.1.1 E. only accepts time requests from 192.168.1.4 F. only updates its time from 192.168.1.4

Answer: ACF Explanation: IOS router defines the following four types of access for NTP: 1) Peer – permits router to respond to NTP requests and accept NTP updates. NTP control queries are also accepted. This is the only class which allows a router to be synchronized by other devices. 2) Serve – permits router to reply to NTP requests, but rejects NTP updates (e.g. replies from a server or update packets from a peer). Control queries are also permitted. 3) Serve-only – permits router to respond to NTP requests only. Rejects attempt to synchronize local system time, and does not access control queries. 4) Query-only – only accepts NTP control queries. No response to NTP requests are sent, and no local system time synchronization with remote system is permitted.

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